Questions

Multiple-choice questions you can practise one by one. Open a question, tap an answer and see at once whether it is right. For a random set, try Quick practice.

941 questions

• A controlled rectifier converts AC into:

  Industrial Electronics & Control of Drives › Unit 2: Controlled Rectifiers · Easy

• Which term describes the angle at which an SCR is triggered in an AC cycle?

  Industrial Electronics & Control of Drives › Unit 2: Controlled Rectifiers · Easy

• What is the purpose of a heat sink on a power semiconductor?

  Industrial Electronics & Control of Drives › Unit 1: Introduction to Thyristors · Easy

• Which circuit is a common application of a TRIAC?

  Industrial Electronics & Control of Drives › Unit 5: Power Converter Applications · Easy

• An SCR is generally turned on by applying a suitable signal to its:

  Industrial Electronics & Control of Drives › Unit 1: Introduction to Thyristors · Easy

• What is the full form of UJT?

  Industrial Electronics & Control of Drives › Unit 1: Introduction to Thyristors · Easy

• Which two-terminal device is commonly used to trigger a TRIAC?

  Industrial Electronics & Control of Drives › Unit 1: Introduction to Thyristors · Easy

• Which device is bidirectional and commonly used for AC power control?

  Industrial Electronics & Control of Drives › Unit 1: Introduction to Thyristors · Easy

• What is the main function of the gate terminal of an SCR?

  Industrial Electronics & Control of Drives › Unit 1: Introduction to Thyristors · Easy

• Which three terminals are present in an SCR?

  Industrial Electronics & Control of Drives › Unit 1: Introduction to Thyristors · Easy

• How many terminals does a conventional SCR have?

  Industrial Electronics & Control of Drives › Unit 1: Introduction to Thyristors · Easy

• What does SCR stand for?

  Industrial Electronics & Control of Drives › Unit 1: Introduction to Thyristors · Easy

• Which device is commonly used as a controlled rectifier switch?

  Industrial Electronics & Control of Drives › Unit 1: Introduction to Thyristors · Easy

• What is the purpose of a snubber network commonly connected across an SCR?

  Industrial Electronics & Control of Drives › Unit 1: Introduction to Thyristors · Hard

• Which comparison between voltage-source and current-source inverters is correct?

  Industrial Electronics & Control of Drives › Unit 3: Inverters, Choppers, Dual Converters and Cyclo-Convertors · Hard

• In a dual converter, the two converters are connected so that the system can provide:

  Industrial Electronics & Control of Drives › Unit 3: Inverters, Choppers, Dual Converters and Cyclo-Convertors · Hard

• Why is excessive di/dt at SCR turn-on potentially damaging?

  Industrial Electronics & Control of Drives › Unit 1: Introduction to Thyristors · Hard

• For an ideal single-phase half-wave SCR rectifier with a resistive load and a sinusoidal source, conduction occurs over which interval in each positive half-cycle?

  Industrial Electronics & Control of Drives › Unit 2: Controlled Rectifiers · Hard

• Which statement best describes a cycloconverter?

  Industrial Electronics & Control of Drives › Unit 3: Inverters, Choppers, Dual Converters and Cyclo-Convertors · Medium

• In a single-phase fully controlled bridge rectifier, the controlled switches are typically:

  Industrial Electronics & Control of Drives › Unit 2: Controlled Rectifiers · Medium